Employee Benefit Plans (Components Of The Change In Unamortized Actuarial Losses, Net, Included In Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2015	Dec. 31, 2014	Dec. 25, 2013
AOCI Attributable To Parent, Net Of Tax [Roll Forward]
Net (loss) gain	$ (3,894)	$ 1,248	$ 876
Settlement loss recognized		(50)
Minimum pension liability adjustment	(2,230)	6,304	(6,309)
Total minimum pension liability adjustments included as a component of accumulated other comprehensive loss, net of tax	(22,800)	(25,000)
Total minimum pension liability adjustments included as a component of accumulated other comprehensive loss, tax benefit	2,200	3,700
Pension Plan [Member]
AOCI Attributable To Parent, Net Of Tax [Roll Forward]
Balance, beginning of year	(27,574)	(17,433)
Benefit obligation actuarial gain (loss)	5,780	(12,313)
Net (loss) gain	(3,894)	1,248
Amortization of net loss	1,733	924	1,653
Balance, end of year	(23,955)	(27,574)	(17,433)
Other Defined Benefit Plans [Member]
AOCI Attributable To Parent, Net Of Tax [Roll Forward]
Balance, beginning of year	(1,081)	(899)
Benefit obligation actuarial gain (loss)	(43)	(298)
Amortization of net loss	79	66	71
Settlement loss recognized	0	50	0
Balance, end of year	$ (1,045)	$ (1,081)	$ (899)